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ATLAS analysis One Lepton Mode BG-estimate

ATLAS analysis One Lepton Mode BG-estimate. 2007.8.3 Ginga Akimoto. Abstract. mEt LepPt JetPt1 is MT-independent (MT<200) ctrl: #(MT=0-100), ctrl*: 2*#(MT=100-150) main BG: ctrl:tt-lnqq, ctrl*:tt-lnln tt-bblnln & tt-lnqq are similar. signal(ctrl)-signal(ctrl*) = (ttlnqq+W)(ctrl) =BG(ctrl).

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ATLAS analysis One Lepton Mode BG-estimate

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  1. ATLAS analysisOne Lepton Mode BG-estimate 2007.8.3 Ginga Akimoto

  2. Abstract • mEt LepPt JetPt1 is MT-independent (MT<200) • ctrl: #(MT=0-100), ctrl*: 2*#(MT=100-150) • main BG: ctrl:tt-lnqq, ctrl*:tt-lnln • tt-bblnln & tt-lnqq are similar. • signal(ctrl)-signal(ctrl*) = (ttlnqq+W)(ctrl) =BG(ctrl)

  3. MT distribution : #(MT) • Shape of SUSY : similar to each other • tt->bblnln & W: #(MT>100) << #(MT<100) • SUSY & tt->bblnqq : #(MT) not change for MT<200

  4. #(0-100) 2*#(100-150) #(100-200) SU1 173.916 164.732 136.585 SU2 21.4488 19.5048 16.2 SU3 323.865 283.926 240.641 SU4 3530.3 2986.78 2240.8 tt-bblnln 169.22 165.021 121.858 tt-bblnqq 1465.52 55.3218 28.6766 W 668.41 25.1715 15.2572 #(MT) • Main BG • tt-bblnqq MT<100 (control sample) • tt-bblnln MT>100 • 1/fb

  5. Similarity of mET

  6. Similarity of JetPt1

  7. Similarity of Lepton Pt

  8. Similarity of ttlnln & ttlnqq

  9. Control Sample BG estimation ( mET )

  10. Control Sample BG estimation (JetPt1)

  11. Control Sample BG estimation (nJet)

  12. Control Sample BG estimation (Pt_Lep)

  13. BG estimate

  14. Systematic Error (mET*1.1)

  15. Systematic Error (mET*1.1)

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